Problem- Cutting copper 2mm my first post

[welly2000]

Hi All
i need help cutting 2mm copper
I am using Infotec CNC router with ELTE spindle 0.75 KW power and 15,000 RPM. I need to cut small parts i am using carbide 1mm, and 2mm diameter
I need to know the best setting to do that because i already broke some bits

please help to identift the right RPM, Feed speed and step down for my bits

P.S. i am not using any coolant maybe any one suggest what to do???

Regards

[welly2000]

any one may want to share his experince

[Superman]

Have not done copper for a while, it's a gummy material

Carbides running too fast tend to push up major burrs and not slice it off.
Use Steel speeds and feeds, with extra sharp cutters, (HSS or Carbides for aluminium)
For coolant - some suggest kero, something to stop chips sticking,

for example see
http://www.iscar.com/Ecat/familyHDR....type/1/lang/EN

[welly2000]

Thanks Superman for you help
do you know any laser solution can cut better with a good price
I am talking about max thickness 2 mm

[Superman]

Don't know about laser, especially with copper.
waterjet ?? plasma may melt the copper

Depends on quantity, accuracy, etc. required, or the details that need machining ?

Large quantity - could possibly be stamped and / or folded leaving hole/s to drill maybe ?

Just throwing other options up in the air

[JeffmMSM]

You may give waterjet a shot. I cut 1/16 (or 1.5875mm) about two weeks ago with one and it cut beautifully.

[welly2000]

but what about waterjet accuracy and machine prices

[jimcolt]

Plasma will do a decent job on this thickness of copper....although you do not mention your tolerance requirements and size and features required on the parts.

Jim

[JeffmMSM]

Waterjet is known for being able to produce tight tolerances, we stay within a few thousandths of an inch. Machine prices are pretty steep but cut prices vary with runtime. 2mm copper wouldnt take very long to cut.

[welly2000]

Any one know a good waterjet machine with a good price with max working area 120 x70 cm needed

[JeffmMSM]

I dont know about purchasing a waterjet with such a small table, I have heard of 4'x4' tables, but not much smaller than that. If you are just looking at having a few parts made, you can send me some drawings and see if that's something we could cut.